Introduction This supplement to the March 2010 Quarterly Bulletin provides revised statistical and methodological information, following the eighth comprehensive revision of South Africa’s national accounts estimates and the change in the base year of constant price estimates from 2000 to 2005.1 Revised annual national accounts data are now available from 1946 to 2009, with quarterly data from 1960 onwards. The South African Reserve Bank (the Bank) and Statistics South Africa (Stats SA) are collectively responsible for compiling the national accounts in South Africa. Stats SA is responsible for calculating the gross domestic product according to the production and income approaches, while the Bank is responsible for compiling the expenditure side of the national accounts. In addition, the Bank compiles institutional sector accounts, which include estimates of national saving; household debt; and net lending or borrowing among institutional sectors and to, and from, the rest of the world. Stats SA and the Bank co-operate closely in compiling national accounts estimates at current as well as constant prices, and in undertaking benchmark revisions.